Historical clue formulations

• Nation dubbed the "cradle of mankind" — 2025-12-26
• Nairobi is its largest city — 2025-04-22
• Home of many champion marathoners — 2025-03-05
• Its capital is Nairobi — 2024-08-26
• Distance running powerhouse — 2024-06-12
• Olympic marathon powerhouse — 2024-03-28
• Marathoning powerhouse — 2023-09-06
• Neighbor of Tanzania — 2023-08-14
• Endpoint of the Great Wildebeest Migration — 2023-04-27
• Home country of the two-time Olympic marathon winner Eliud Kipchoge — 2022-04-14
• Country that celebrated Obama Day in 2008 — 2021-09-13
• Home of the 2016 men's and women's Olympic marathon winners — 2019-04-14
• Mount ___, second-highest peak in Africa — 2018-07-22
• Mombasa is its second-largest city — 2016-12-07
• Home of Obama's father — 2015-04-20
• Country whose currency is the shilling — 2014-05-17
• Neighbor of Somalia — 2013-07-07
• Birthplace of Obama's father — 2012-07-31
• Home of Barack Obama Sr. — 2012-03-20
• Equatorial land — 2011-11-03
• Home of Barack Obama's father — 2009-08-03
• Home of Barack Obama's father — 2008-09-30
• Setting for "The Constant Gardener" — 2006-05-03
• Nairobi's land — 2002-09-10
• Home to the Masai — 2001-03-27
• Mount ___, second-highest mountain in Africa — 1999-08-28
• Great Rift Valley locale — 1998-07-17
• Nairobi's land — 1996-12-30
• Nairobi's land — 1996-11-04
• Runner Kip Keino's homeland — 1995-08-04
• Moi's country — 1994-03-15